Thanks to those Navagraha doshas, folks face several obstacles & hindrances in their life. As a way to lessen and negate the malefic doshas or malefic affect of such planets, we complete various Pujas & Yagnas. Another etymology indicates that valga indicates "to paralyze" and symbolizes the power of stambhana, https://www.youtube.com/shorts/5VeSyP9JRw0